Marine Naiad
Najas marina
Last reviewed: June 2026
Light
part shade
Water
high
Size
4"–40" H
Bloom
Jun, Jul, Aug, Sep
Native to
AZ, CA, FL, IL and 14 more states
Browse plants for this ecoregion
Marine naiad is a submerged aquatic plant that grows entirely underwater in lakes, ponds, and slow-moving streams. This annual plant produces small inconspicuous flowers and helps oxygenate water while providing habitat for fish and aquatic wildlife.
In an HOA neighborhood
Marine Naiad takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
- Strictly aquatic plant unsuitable for typical residential landscaping
- Requires permanent water feature or pond for survival
- Not visible or functional in standard garden beds
Wildlife value
Provides critical habitat and food for waterfowl, fish, and aquatic invertebrates. The submerged foliage offers shelter for young fish and nesting sites for aquatic insects.
Common questions
- How much sun does Marine Naiad need?
- Marine Naiad grows best in part shade conditions.
- When does Marine Naiad bloom?
- Marine Naiad blooms in June, July, August, and September.
- Where is Marine Naiad native?
- Marine Naiad (Najas marina) is native to AZ, CA, FL, IL and 14 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Marine Naiad HOA-friendly?
- Marine Naiad takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Marine Naiad? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz